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A. H. PRENZEL.

SHOE.

APPLICATION FILED AUG. 10, 1912.

1,195,151. Patented Aug. 15, 1916.

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ADAM H. PRENZEL, OF HALIFAX, PENNSYLVANIA, ASSIGNOR, TO UNITED SHOEMACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

- SHOE.

1,195,151. Specification of Letters Patent Patented Aug. 15, 19163.

Original application filed February 5, 1912, Serial No. 675,594. PatentNo. 1,050,040, dated January 7, 1913.

Divided and this application 'filed August 10, 1912. Serial No. 714,443.

To all whom it may concern Beit known that I, ADAM' H. PRENZEL, acitizen of the United States, residing at Halifax, in the county ofDauphin and State of Pennsylvania, have invented certain Imgrovements inShoes, of which the following escription, in connection with theaccompanying drawings, is a specification, like reference characters .onthe drawings indicating like parts in the several figures.

This invention relates to shoes and more particularly to spring heel or'underwedge shoes of the general type disclosed in my reissued LettersPatentNo. 13,448, dated July 23, 1912.

An object of the invention is still further to improve the constructionof shoes of the. type disclosed in the Letters Patent above identified,to the end that the manufacture of shoes of the general type hereinabovereferred to may be facilitated, and to the further end that a novel shoemay be roduced which is superior in quality, fit an appearance to shoesheretofore known.

A particular object of the invention is to provide a shoe in whichcompensation is made for the arch of the last whereby a spring heel shoeis produced having a substantially level tread surface.

Figure 1 is a perspective view showing the sole and recessed heelportion; Fig. 2 is a broken view showing the sole with the heel seatpiece cemented in position in the recess at the heel end thereof; Fig. 3is a broken view showing the sole after the breaking down or offsettingoperation has been performed; Fig. 4 is a broken view showing the soleafter the beveling operation has been performed upon the edge of theheel seat piece and for a short distance in front of saidpiece; Fig. 5is a broken view; partly in section showing the sole after thechanneling operation has been performed; Fig. 6 is a broken view; partlyin section showing the sole after it has been molded; Fig. 7 is aperspective view of the underwedge piece; Fig. 8 is a detail view partlyin sectlon of the heel end of the shoe showing the shoe after it hasbeen turned and after the underwedge piece has been inserted and nailedin position; and Fig. 9- illustrates an alternative mode of permanentlysecuring the underwedge in position by a line of stitches passingthrough the 7' heel seat piece, thev underwedge and the sole outside ofthe upper.

The preferred method of making the shoe constituting the presentinvention is disclosed and fully described in United States LettersPatent No. 1,050,040, grantedJan:

nary 7, 1913, on my co-pending application, I

of which application the present application is a division.

In carrying out my invention the sole of the shoe is first provided witha recess at its heel end substantially like that shown in Fig. 1, thisrecess being rovided at its front end with a beveled or inclined wall 2and having its greatest de th at the lower end of said wall. Thethinnest portion of the recessed sole is therefore located at the lineof junction 4 of the front wall of the recess with the bottom 6 of therecess where there is the least wear and the thickest part of the heelend of the sole is at the rear end thereof where the greatest wearoccurs.

The sole having been recessed in the manner shown in Fig. 1, a heel seatpiece 8jis selected, of a thickness somewhat greater than the greatestdepth of the recess, and thisheel seat piece is provided at its frontend with a bevel 10 corresponding to the bevel of the front wall of therecess. The lower face of the heel seat piece is provided with a coatingof cement and the heel seat.

.piece'is then temporarily secured in the recess in the heel end of thesole by pressing it into engagement with the bottom 6 of said recess.The appearance of the heel end of the sole will then be substantially asshown inFig. 2.

' In order that the upper surfaces of the heel seat piece and theforepart of the sole may be in substantially flush relation for thesucceeding channeling operation, the sole 1s now subjected to pressurein such manner that the heel end of the sole will be offset with respectto the forepart of the sole sufficiently to bring the aforementionedsurfaces into flush relation. The resultant appearance of the parts willbe substantially as shown in Fig. 3.

The edge of the heel seat piece 8 is now beveled to furnish a surfaceagainst which the upper may be pressed during thestitching operation,the amount of the bevel determining the distance back from the edge ofthe sole that the upper will be located as a result of the sewingoperation. This bevel 12 is preferably extended a short distance infront of the line of junction 14 of the heel seat piece with theforepart of the extending into the beveled portion of the sole a shortdistance upon each side. The sole is then molded in the manner shown inFig. 6 to emphasize the shoulder and bevel so as to facilitate thestitching operation,

after which the upper is sewed to the sole wrong side out. The shoe isthen turned and the heel seat piece is separated from the sole. Anunderwedge piece 20 is then inserted between the heel end of the soleand the heel seat piece, this underwedge preferably being of the shapeshown in Fig. 7,

that is, having its greatest thickness near its forward end. The forwardend of the underwedge is beveled to correspond to the bevel at theforward end of the heel seat piece.

An object of making the underwedge piece thicker at the frontend thanatthe rear end is thatthereby compensation may be made for the arch of thelast and that the resultant spring heel may be provided with asubstantially level tread face. For lasts having different degrees ofarching, underwedges differently proportioned may obviously be used. Theunderwedge herein shown is preferably made by compressing a lift pieceof substantially uniform thickness in such manner that one end will besubjected to greater pressure than the other end, the end subjected tothe greater pressure being located at the end of the heel subjected tothe greater wear.

The underwedge piece having been inserted between the heel seat pieceand the heel end of the sole, these three parts are united by nails 22which are driven through. the three parts and clenched upon the insideof the shoe. If it is desired to avoid having any metal upon the insideof the shoe, these parts may be united in the manner shown in Fig. 9 bya line of stitches 24 extending through them outside the upper.

It will be seen from an inspection of Fig. 8 of the drawings that afterthe underwedge has been inserted and has beensecured permanently betweenthe heel seat iece and the sole the recess at the heel end of the solehas the appearance of having been deepened. This effect may be producedin either one of two ways, either the line of junction 14: of the oflsetheel end of the sole with the forepart may be caused to travel forward ashort distance or the line 4: where the inclined front wall 2 meets thebottom 6 may be caused to travel toward the rear. In the first case theheel seat will travel up the inclined front wall until it comes intoengagement with the newly formed incline, the stitches which bridge thejunction permitting the slight forward movement necessary. The preferredmode of procedure, however, is to cause the line 4 to travel back, thisbeing effected easily by breaking the heel end of the sole over thefront lower edge of the underwedge, the nails 22 or the stitches 24securing the parts permanently in their new relative positions.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is A shoe comprising, incombination, a sole provided at the heel end with a recess having itsgreatest depth near its front end, said heel end being of increasingthickness from the forward end of the recess to the rear thereof, a heelseat piece abutting at its front end against the front wall of saidrecess, said heel seat piece having its upper surface substantiallyflush with that of the sole, an upper secured to the sole and to saidheel seat piece upon the inside of the shoe,

and an underwedge. thicker at its front end than at its rear end locatedbetween said heel seat piece and the bottom of said recess,

the combined thickness of said underwedge and said heel seat piece beingso proportioned to the arch of the last and to the varying depth of therecess as to make the tread face of the heel end of the sole sub--stantially level.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LUTHER W. RYAN, C. F. STILL.

